Malicious PDF — malware analysis report

Static analysis result for SHA-256 c519875847443529…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 01:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 670319513d6b54931f23922a9a342b37 SHA-1: 7313ab0e42483290402e5c6be4ed56ce06e74981 SHA-256: c5198758474435291f2ebad3294e4a95305f99edf8a5fe0611f2e19d28cd2f78
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The primary external URL, https://xezojetit.ru/wix?keyword=super+life+secret+code+pdf, is likely part of this redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/wix?keyword=super+life+secret+code+pdf PDF link annotation
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/kopevi.pdfIn PDF document text
    • https://jobavoxiduru.weebly.com/uploads/1/3/4/7/134722818/fikux.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/iMjhX9J/nubojunimezolowasebowifi.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/ibV7Yhe/robuvo.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/23531773485.pdfIn PDF document text
    • https://zefuriduzowav.weebly.com/uploads/1/3/0/7/130740504/7956789.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/hbge4hh/how_to_write_in_charge_or_incharge.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/9591788.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/kgh6X1V/kabobidakiratapowit.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/xutevuwojiwa-xofekakixusuz-daralasijep-xanapetadubas.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/ghihb8F/wituviraligagupono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b3c8bc-dee2-465f-bb7b-b28b2fd218ca/42720306772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862cba0a-9aaf-4fca-9239-227bb3ef2a9f/28971427904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/598d02d9-b89a-415a-8dd9-0ea466b852f9/xujoxubijawiruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc62624-0dd0-4da8-99d3-bf82e3d8dac4/what_does_it_mean_when_you_dream_you_give_birth_to_a_baby_girl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f9c6e0-67b1-47b2-a266-6e1866831f55/judumaxikolewufonuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a17409-ee3b-40d7-9df9-dd38abd1eefd/bilonepusegopafaduse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36e1320-0fa5-452f-bb11-bca880ae1d36/1349031587.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/over_the_rainbow_chords_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/95279495455.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/endometriosis_rcog_guidelines_2018.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/zisupojapijujapagudu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 5040 bytes
SHA-256: 1fb9e60f06091eaafe8837453485ef3e8678397cad494f84ea370c9b7520269b
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 2252 bytes
SHA-256: f3ffe4ba3621d765656d78aaabd71fd798feab98c1821a744cf45e925a576ee8
font_02_sfnt_off0001097e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097E 10764 bytes
SHA-256: b99edff843b7e9a3ecbbbbf7c9ed191c3145c6d47f9d1d1aa970be42199e9020